520656 has 20 divisors (see below), whose sum is σ = 1345152. Its totient is φ = 173536.

The previous prime is 520649. The next prime is 520679. The reversal of 520656 is 656025.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5376 + ... + 5471.

2⁵²⁰⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

520656 is an abundant number, since it is smaller than the sum of its proper divisors (824496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520656 is a wasteful number, since it uses less digits than its factorization.

520656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10858 (or 10852 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 520656 is about 721.5649658901. The cubic root of 520656 is about 80.4483162965.

It can be divided in two parts, 520 and 656, that added together give a triangular number (1176 = T₄₈).

The spelling of 520656 in words is "five hundred twenty thousand, six hundred fifty-six".